Sip on the move.
Designed for quick hydration without the tilt, the Hydro Flask 21 oz Standard Mouth Straw Flex Cap Bottle keeps your drinks cold and your day flowing. Whether you’re commuting, hitting the gym, or walking through town, the built-in straw makes staying refreshed effortless.
TempShield™
Double-wall vacuum insulation keeps beverages cold for up to 24 hours or hot for up to 12 — with no condensation.
Pro-Grade Stainless Steel
Made with 18/8 pro-grade stainless steel to ensure pure taste, no flavor transfer, and maximum durability.
Straw Flex Cap
Leakproof when closed, the Straw Flex Cap offers easy access and comfortable carry for hydration on the go.
Proprietary Powder Coat
Durable, sweat-free, and easy to grip — this bottle is built to handle life’s adventures.
Product Benefits
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Straw Flex Cap for easy, one-handed sipping
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TempShield™ insulation keeps beverages cold up to 24 hours or hot up to 12 hours
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Durable 18/8 Pro-Grade Stainless Steel construction
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BPA-Free and Phthalate-Free
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Fits most car cup holders and backpack side pockets
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Dishwasher safe
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Compatible with other Standard Mouth accessories
Size & Dimensions
21 oz
Volume: 621 mL
Mouth Diameter: 1.91″
Diameter: 2.87″
Height: 9.4″
Weight: 11.3 oz